(under the class definition) Subject matter provided with means operated by the discharge device mechanism to remove and/or to penetrate deposits of electrically nonconductive material on the discharge end of one of the electrodes so that good electrical contact can be made between the discharge electrodes whereby the discharge can be more easily initiated between the electrodes when they are brought into contact with each other.
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21, for consumable electrode discharge devices provided with means for feeding an auxiliary material to the discharge area between the electrodes for the purpose of cleaning the electrodes.
34, for consumable electrode discharge devices having two principal discharge electrodes and an auxiliary electrode designed to initiate a discharge between itself and one of the principal electrodes, the auxiliary electrode being placed with respect to the principal electrode so that the discharge is initiated at a part of the principal electrode which is not covered with a nonconductive deposit, the discharge being shifted to the principal electrodes when the nonconducting deposit has been heated and rendered conducting.
